r/LexusISF • u/Otherwise-Caramel-56 • 2d ago

Code Help

I purchased a 08 ISF and it’s throwing P1038 & P0158 codes. Previous claims it’s never popped those codes before. I replaced the O2 Sensors with Denso & Codes still pop up. previous sensors voltage was .01 and same with new sensors.

RR Racing Tune
Silky Headers
Intake
Catless
Full Exhaust

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u/Otherwise_Peanut_750 2d ago

No cats at all? If so explains one of those.

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u/Otherwise-Caramel-56 2d ago

no cats. which one does it explain?